Use 'unsigned int' for global_data's baudrate

We decided to used unsigned int here, rather than unsigned long. But
for the generic global_data it is still unsigned long. So change it
over.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/asm-generic/global_data.h

@@ -40,7 +40,7 @@
 typedef struct global_data {
 	bd_t *bd;
 	unsigned long flags;
-	unsigned long baudrate;
+	unsigned int baudrate;
 	unsigned long cpu_clk;	/* CPU clock in Hz!		*/
 	unsigned long bus_clk;
 	/* We cannot bracket this with CONFIG_PCI due to mpc5xxx */